Supreme Pizza Lasagna

Name: Supreme Pizza Lasagna
Ingredients: 2 tablespoons olive oil; 2 pounds Italian sausage; 1 pound ground beef; 12 ounces sliced pepperoni; 1 pound mushrooms, sliced; 3 cloves garlic, minced; 2 green bell peppers, diced; 2 red bell peppers, diced; 1 large onion, diced; One 28-ounce can whole tomatoes; One 15-ounce can tomato paste; 1/4 cup prepared pesto; 1/3 cup finely minced fresh parsley; 2 teaspoons salt; 1 teaspoon freshly ground black pepper; 1/2 teaspoon red pepper flakes; 1/2 cup sliced black olives; 30 ounces whole-milk ricotta; 2 eggs, beaten; 1/2 cup grated Parmesan, plus extra for sprinkling; 8 lasagna noodles, cooked until al dente; 24 ounces fresh mozzarella, cut into thin slices